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The Iris Project

This server is all about the development and community around Iris Shaders!

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TIP

The Iris Project

This server is all about the development and community around Iris Shaders!

Join

Zeke

9/18/2025

Hey! Game crashes upon loading up world

When i load my world my game crashes. If i turn shaders off and load in, everything is fine! I can even turn shaders back on AFTER joining the world with them off. But after a few game restarts the crashes happen again. YES I am aware i have sinytra connector in this pack. But i have removed connector and all fabric mods and i STILL get this issue! Thank you for any help! java.lang.NoClassDefFoundError: Could not initialize class net.irisshaders.iris.pathways.FullScreenQuadRenderer...

Solution:

seems to be caused by ProbeJS

latest.log

draconiatikey

9/18/2025

So its saays its incompatible but it also says the version i got is compatible??!?!

Vee (They/It)

9/17/2025

Trouble find correct shaders again

I took these screenshots a week or two ago and forgot which shader is which 😭 Any idea?...

MorganMJ

9/16/2025

Can't play with iris and DH

Hey, so I'm trying to get iris and distant horizions to work together, but I can't, could anyone help?

♡ 𝓣𝓮𝓶𝓲 ♡

9/15/2025

Iris issues with Epic fight mod

Iris launches shader to cause first person incorrect rotation as you can see in the video neoforge: 21.1.193 modlist: epicfight-neoforge-21.11.1-1.21.1 iris-neoforge-1.8.12+mc1.21.1...

Archeus

9/11/2025

Yeah not sure why but the shaders just refuse to load lol

its delightful

message.txt

Sparkus_Gaming

9/10/2025

cant use shaders. when try to load

when I try to load shaders minecraft crashes

Kugelwasser

9/6/2025

Got a problem

Shader compilation failed for shadowcomp compute shadowcomp!

Vandamme

9/6/2025

No shaders work weirdly,photon,derivative. only super duper vanilla

Every time i try a shaderpack,it just gives me the error that it failed to load. here's the log `prepare: prepare: Type mismatch: Type of _O;clouds_params;l0_cumulus_stratus_blend different between shaders. Type mismatch: Type of _O;clouds_params;l0_coverage different between shaders. Type mismatch: Type of _O;clouds_params;l0_altitude_scale different between shaders. Type mismatch: Type of _O;clouds_params;l0_detail_weights different between shaders....

Squeetsquib

9/5/2025

Low FPS with Shaders

hey everyone, having some weird issue with shaders. without i get a solid 350fps with any shader pack (tried 6) im stuck around 30ish fps tried even minimalist vanilla shaders, set settings to very low - no change 13th Gen Intel(R) Core(TM) i9-13900KF 4090 ...

Glaedryc

9/3/2025

Odd Behavior with Handheld Maps when using Shaders

Pretty much the title. I'm using the Iris/Fabric 25w32a build from a few weeks ago. Tested with 1.21.8 and I get the same result as shown in the video. It essentially looks like maps are being projected onto other objects/locations.

Solution:

👌

Komik

9/2/2025

Shaders visual bug near leaves

I'm using Iris 1.9.1 and Sodium and only those, whenever I turn on shaders of any kind, there is this weird visual bug that seems to create a visual for a nonexistent leaf block underneath a leaf block (it has outlines, slightly visible textures however thoroughly translucent) Although the visual impact is minimal but it throws me off so much every time I see it so plz can anyone help

arnekick

9/1/2025

Game crashes and i cannot figure out why i will include the log.

https://pastebin.com/raw/iuwtfSTK

dragon

8/31/2025

Parrots on shoulder cause crashing

I saw that the issue was posted on the github as an issue, but I also want it to be known here. I have attached the crash report. I can provide a full list of mods and libraries as well if needed. Version: 1.21.1 Neoforge version: 21.1.206 Iris: 1.8.12+mc1.21.1...

crash-2025-08-31_14....

Simple guy

8/31/2025

I need help I can't run sharder

I play in mojo luncher but I can't run any sharder I got a very good mobile gpu and I tried all render (not zink it's crashes)but when ever I run sharder it's sayes it's failed to run this sharder contact Dev's and there's a click more option if I click it it will tell me buffer blending

ImVello

8/28/2025

Shaders Don't work with modrinth

When I load my game, the shader tab does not show up in the video settings

RoarkCats

8/26/2025

Shader GUI Lag

I've encountered a weird bug with Iris based shaders where I get immense lag while in a GUI or any menu I've experienced this bug across multiple shaderpacks (Photon, SEUS_PTGI, Compl Reimagined) I'v experienced this bug in large Forge modpack (300+ mods) with Oculus AS WELL AS with a super light client side Fabric pack (10 mods)...

Robinjonesvtuber

8/25/2025

internet explorer fake download

I do not know how else to describe what I am seeing I clicked download and it gives me this like fake 'download' link

Solution: